Merge V8 5.3.332.45. DO NOT MERGE
Test: Manual
FPIIM-449
Change-Id: Id3254828b068abdea3cb10442e0172a8c9a98e03
(cherry picked from commit 13e2dadd00298019ed862f2b2fc5068bba730bcf)
diff --git a/test/cctest/heap/test-page-promotion.cc b/test/cctest/heap/test-page-promotion.cc
new file mode 100644
index 0000000..4ec2e2a
--- /dev/null
+++ b/test/cctest/heap/test-page-promotion.cc
@@ -0,0 +1,129 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/heap/array-buffer-tracker.h"
+#include "test/cctest/cctest.h"
+#include "test/cctest/heap/heap-utils.h"
+
+namespace {
+
+v8::Isolate* NewIsolateForPagePromotion() {
+ i::FLAG_page_promotion = true;
+ i::FLAG_page_promotion_threshold = 0; // %
+ i::FLAG_min_semi_space_size = 8 * (i::Page::kPageSize / i::MB);
+ // We cannot optimize for size as we require a new space with more than one
+ // page.
+ i::FLAG_optimize_for_size = false;
+ // Set max_semi_space_size because it could've been initialized by an
+ // implication of optimize_for_size.
+ i::FLAG_max_semi_space_size = i::FLAG_min_semi_space_size;
+ v8::Isolate::CreateParams create_params;
+ create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
+ v8::Isolate* isolate = v8::Isolate::New(create_params);
+ return isolate;
+}
+
+} // namespace
+
+namespace v8 {
+namespace internal {
+
+UNINITIALIZED_TEST(PagePromotion_NewToOld) {
+ v8::Isolate* isolate = NewIsolateForPagePromotion();
+ i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+ {
+ v8::Isolate::Scope isolate_scope(isolate);
+ v8::HandleScope handle_scope(isolate);
+ v8::Context::New(isolate)->Enter();
+ Heap* heap = i_isolate->heap();
+
+ std::vector<Handle<FixedArray>> handles;
+ heap::SimulateFullSpace(heap->new_space(), &handles);
+ heap->CollectGarbage(NEW_SPACE);
+ CHECK_GT(handles.size(), 0u);
+ // First object in handle should be on the first page.
+ Handle<FixedArray> first_object = handles.front();
+ Page* first_page = Page::FromAddress(first_object->address());
+ // To perform a sanity check on live bytes we need to mark the heap.
+ heap::SimulateIncrementalMarking(heap, true);
+ // Sanity check that the page meets the requirements for promotion.
+ const int threshold_bytes =
+ FLAG_page_promotion_threshold * Page::kAllocatableMemory / 100;
+ CHECK_GE(first_page->LiveBytes(), threshold_bytes);
+
+ // Actual checks: The page is in new space first, but is moved to old space
+ // during a full GC.
+ CHECK(heap->new_space()->ContainsSlow(first_page->address()));
+ CHECK(!heap->old_space()->ContainsSlow(first_page->address()));
+ heap::GcAndSweep(heap, OLD_SPACE);
+ CHECK(!heap->new_space()->ContainsSlow(first_page->address()));
+ CHECK(heap->old_space()->ContainsSlow(first_page->address()));
+ }
+}
+
+UNINITIALIZED_TEST(PagePromotion_NewToNew) {
+ v8::Isolate* isolate = NewIsolateForPagePromotion();
+ Isolate* i_isolate = reinterpret_cast<Isolate*>(isolate);
+ {
+ v8::Isolate::Scope isolate_scope(isolate);
+ v8::HandleScope handle_scope(isolate);
+ v8::Context::New(isolate)->Enter();
+ Heap* heap = i_isolate->heap();
+
+ std::vector<Handle<FixedArray>> handles;
+ heap::SimulateFullSpace(heap->new_space(), &handles);
+ CHECK_GT(handles.size(), 0u);
+ // Last object in handles should definitely be on the last page which does
+ // not contain the age mark.
+ Handle<FixedArray> last_object = handles.back();
+ Page* to_be_promoted_page = Page::FromAddress(last_object->address());
+ CHECK(to_be_promoted_page->Contains(last_object->address()));
+ CHECK(heap->new_space()->ToSpaceContainsSlow(last_object->address()));
+ heap::GcAndSweep(heap, OLD_SPACE);
+ CHECK(heap->new_space()->ToSpaceContainsSlow(last_object->address()));
+ CHECK(to_be_promoted_page->Contains(last_object->address()));
+ }
+}
+
+UNINITIALIZED_TEST(PagePromotion_NewToNewJSArrayBuffer) {
+ // Test makes sure JSArrayBuffer backing stores are still tracked after
+ // new-to-new promotion.
+ v8::Isolate* isolate = NewIsolateForPagePromotion();
+ Isolate* i_isolate = reinterpret_cast<Isolate*>(isolate);
+ {
+ v8::Isolate::Scope isolate_scope(isolate);
+ v8::HandleScope handle_scope(isolate);
+ v8::Context::New(isolate)->Enter();
+ Heap* heap = i_isolate->heap();
+
+ // Fill the current page which potentially contains the age mark.
+ heap::FillCurrentPage(heap->new_space());
+
+ // Allocate a buffer we would like to check against.
+ Handle<JSArrayBuffer> buffer =
+ i_isolate->factory()->NewJSArrayBuffer(SharedFlag::kNotShared);
+ JSArrayBuffer::SetupAllocatingData(buffer, i_isolate, 100);
+ std::vector<Handle<FixedArray>> handles;
+ // Simulate a full space, filling the interesting page with live objects.
+ heap::SimulateFullSpace(heap->new_space(), &handles);
+ CHECK_GT(handles.size(), 0u);
+ // Last object in handles should definitely be on the last page which does
+ // not contain the age mark.
+ Handle<FixedArray> first_object = handles.front();
+ Page* to_be_promoted_page = Page::FromAddress(first_object->address());
+ CHECK(to_be_promoted_page->Contains(first_object->address()));
+ CHECK(to_be_promoted_page->Contains(buffer->address()));
+ CHECK(heap->new_space()->ToSpaceContainsSlow(first_object->address()));
+ CHECK(heap->new_space()->ToSpaceContainsSlow(buffer->address()));
+ heap::GcAndSweep(heap, OLD_SPACE);
+ CHECK(heap->new_space()->ToSpaceContainsSlow(first_object->address()));
+ CHECK(heap->new_space()->ToSpaceContainsSlow(buffer->address()));
+ CHECK(to_be_promoted_page->Contains(first_object->address()));
+ CHECK(to_be_promoted_page->Contains(buffer->address()));
+ CHECK(ArrayBufferTracker::IsTracked(*buffer));
+ }
+}
+
+} // namespace internal
+} // namespace v8